Bio-retention area

Baltimore Sun photo by Amy Davis

Tom Lewis, Environmental Program Director for Naval District Washington, discusses a bio-retention area constructed in a parking lot at the U.S. Naval Academy, which helps filter run-off water before it goes into the ground or the Chesapeake Bay.

Tom Lewis, Environmental Program Director for Naval District Washington, discusses a bio-retention area constructed in a parking lot at the U.S. Naval Academy, which helps filter run-off water before it goes into the ground or the Chesapeake Bay. (Baltimore Sun photo by Amy Davis)

Tom Lewis, Environmental Program Director for Naval District Washington, discusses a bio-retention area constructed in a parking lot at the U.S. Naval Academy, which helps filter run-off water before it goes into the ground or the Chesapeake Bay.